I’d like to propose a dedicated iOS client for the Memories app. While the current Nextcloud iOS app works well as a general-purpose client, the photo and video viewing experience could benefit from a specialized, streamlined approach similar to what we see with Apple Photos, Google Photos, or Synology Photos.
On the bugtracker, they have such a request already, some even tried to start something. If you have knowledge, a helping hand is often needed in open source projects: